摘要
以聚丙烯隔膜为基体,在两侧均匀涂覆混有氧化铝粉末、粘结剂、分散剂的无机浆料,得到一种新型陶瓷涂层隔膜,进行改性研究。对聚丙烯隔膜和陶瓷涂层隔膜进行热稳定性试验,在160℃高温环境下,陶瓷涂层隔膜热收缩率为5.0%,聚丙烯隔膜热收缩率为11.67%,说明陶瓷涂层隔膜具有优异的热稳定性。采用陶瓷涂层隔膜组装磷酸铁锂-锂体系电池,并对锂电池进行充放电循环试验,结果表明陶瓷涂层隔膜组装的锂电池在100次循环之后容量保持率为65.87%,高于聚丙烯隔膜组装的锂电池的容量保持率。充放电倍率性能试验结果表明,在高充电倍率下,陶瓷涂层隔膜的倍率性能优于聚丙烯隔膜。
A new type of ceramic coated diaphragm was obtained by uniformly coating inorganic slurry mixed with alumina powder,binder and dispersant on both sides of polypropylene diaphragm as the matrix,and the modification research was conducted.The thermal stability test of polypropylene diaphragm and ceramic coated diaphragm was carried out.Under the high temperature environment of 160 C,the thermal shrinkage rate of ceramic coated diaphragm is 5.0%,and the thermal shrinkage rate of polypropylene diaphragm is 11.67%,indicating that ceramic coated diaphragm has excellent thermal stability.The LiFePO4-Li system battery is assembled using ceramic coated diaphragm,and the lithium battery is subjected to charge and discharge cycle test.The result shows that the capacity retention rate of the lithium battery assembled with ceramic coated diaphragm is 65.87%after 100 cycles,which is higher than the capacity retention rate of the lithium battery assembled with polypropylene diaphragm.The result of charge and discharge rate performance test shows that the ceramic coated diaphragm has better rate performance than the polypropylene diaphragm at high charge rate.
出处
《机械制造》
2024年第11期78-81,88,共5页
Machinery
关键词
锂电池
陶瓷涂层
隔膜
Lithium Battery
Ceramic Coating
Diaphragm
